Alarm-sounding knob for door-locks.



W. KRIZ.

ALARM SOUNDING KNOB FOR DOOR LOCKS.

APPLICATION FILED MAR. 11. 1913.

1,145,Q01 Patented July 6, 1915.

I! I I, I

W1TE@ STATES PATENT OFFICE.

WILLIAM KRIZ, OF ST. LOUIS, MISSOURI, ASSIG-NOR TO THE KRIZ SPECIALTY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

ALABM-SOUNDING KNOB FOR DOOR-LOCKS.

Specification of Letters Patent.

Patented July 6, 1915.

Application filed March 11, 1913. Serial No. 753,591.

To all whom it may concern:

Be it known that I, WILLIAM Knrz} a citizen of the United States, and resident of St. Louis, Missouri, have invented certain new and useful Improvements in Alarm-Sounding Knobs for Door-Locks, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in alarm sounding knobs for door locks, and the object of my invention is to construct a knob, a portion at least of which is an alarm sounding element, which may be applied to the knob shank or bar in substitution for the ordinary door lmob, without altering the knob bar, the escutcheon or any other part of the lock.

A further object of my invention is to construct an alarm sounding knob which may be secured to a look without altering the lock and in which there is a mechanism arranged to effect a sounding of an alarm upon a movement of the knob shank and to provide the alarm sounding mechanism with means whereby the knob shank may be moved without effecting an alarm.

With the above purposes in view my invention consists in certain novel features of construction and arrangement of parts which will be hereinafter described, pointed out in the claims and illustrated by the accompanying drawings, in which' Figure 1 is a longitudinal sectional elevation of one of my improved knobs shown in place upon a knob and-shank of an ordinary construction removed from a lock; Fig. 2 is a sectional elevation taken on the line 22 of Fig. 1 illustrating the bell ringing mechanism; Fig. 3 is a transverse sectional elevation taken on the line 3-3 of Fig.1 and illustrates the means for securing my im proved knob to the knob shank; Fig. 1 is a transverse sectional elevation taken on the line 4- 1 of Fig. l and illustrates the means for connecting the sleeve which supports the alarm sounding knob with the sleeve which connects with the knob shank; and Fig. 5 is a fragmental face view of the plate which supports the clappers and mechanism for moving them, and illustrates the means whereby the plate is secured to the sleeve which supports the knob. Fig. 6 is a fragmentary elevation, partly in section, showing the means for securing the knob to the escutcheon.

Referring by numerals to the accompanying drawings: 10 designates the shank and 11 the knob both of which are of ordinary construction and are the type usually employed in looks for doors.

12 designates-my improved knob which is of ordinary bell-shape, that is a hollow concavo-convexed body.

13 designates a sleeve provided with a non-circular opening in its one end which is shaped to correspond with the cross section of the shank 10, and at its opposite end is internally threaded to receive a cap-screw 11 between which and the end of the sleeve 13 the knob 12 is secured. Within the knob 1.2 is a plate 15 and pivotally carried by the plate is a pair of dogs 16 which are preferably located at diametrically opposite points. Carriedby each of the dogs is a curved elastic clapper-support 17 carrying at their free ends the clappers 18 and impinging at their other ends stops 19 which are secured to and project from the plate 15. Embracing the sleeve is a toothed-wheel 20, the hub-flange 21 of which is secured to the sleeve 13 by means of a pin 22, there being slots 23 in the sleeve 13 which permit of a movement of the wheel. 20 and pin 22 lengthwise or axially relative to the sleeve 13.

24: designates a pin which is extended diametrically through the sleeve which serves as an abutment for an extensile coil spring 25 which also impinges the pin 21 to normally hold the wheel 20 to its one limit of movement. Pivotally supported by the plate 15 at approximately diametrically opposite points are the detents 26 which are arranged to engage the teeth of the wheel 20 and also the inner endsof the dogs 16. The spring 25 referred to normally holds the toothedwheel 20 out of engagement with the detents 26.

27 designates a pin which is arranged to extend through an opening formed in the cap-screw 1 1 and is provided with an enlarged head 28 at its inner end whichserves the function of preventing the pin from be ing withdrawn from thecap screw 141. At the outer end the pin 27 is provided with an annular reduction forming a shoulder 29 which serves to hold the pin in position when forced inwardly against the pressure of the spring 25 and to a position holding the wheel 20 in position to operate the detents 26 and the dogs 16.

30 designates a ring which has an opening shaped to receive the shank 10 and also an opening through which a pin 31. is inserted to lock the ring against lengthwise movements relative to the shank. The form of pin may vary as is illustrated in Fig. 3 in order to adapt the knob to difl'erent types of knob shanks. One form of pin is arranged for the type of shank which has openings therethrough for the reception of pins for locking the knob to the shank, and the other form of pin shown is arranged to secure the ring to that type of shank which is imperforate. I

32 designates a sleeve which embraces th sleeve 13 and through which there is extended a set screw 33 which secures the sleeve 32 against movements lengthwise relative to the screw 33, there being an annular groove or channel 34 in the sleeve 13 to receive the end of the set screw 33.

35 designates an internally threaded ring which is secured to the outer sleeve 32 by shrinking the outermost sleeve, as is clearly shown in Fig. 1. This ring 35 bears against the ring 30 and, by its being secured to the sleeve 32, the sleeve 32 is held against lengthwise movements over the shank, when the ring35 is secured to the escutcheon. The plate 15, previously referred to, is secured to the outer end of the sleeve '32 by means of the tongues 36 struck from the body of the sleeve 32 and engaging notches in the plate 15, as shown in Fig. 5.

37 designates a lock-nut which is arranged to embrace the shank 10, and is provided with a head which rests within the boss of the escutcheon, its end opposite the head being threaded into the ring 35. f

v 38 designates a pallet which is pivotally secured to the plate 15 and serves to retard or control the rotary speed of the toothedwheel 20 when rotated by a turning of the knob 11, or knob 12.

, 39 designates a shield which is rotatably mounted upon-the outer sleeve 32 and is held againstlengthwise movements relative to the sleeve by means of the circular boss 40 on the sleeve 32 and a ring 41 which is secured to the sleeve 32. This shield 39 with the knob proper 12 forms a complete knob, convexo-convexed in cross section.

In order, to apply my improved alarm sounding knob it is only necessary to remove the ordinary inner knob and the inner escutcheon. My improved knob is then placed so that the inner end of the sleeve 32 is within the escutcheon boss, and the lock-nut 371is then inserted in the escutcheon boss and threaded into the ring 35, thereby securing the knob to the escutcheon. The escutcheon with the knob is then placed over the shank 10, r the shank passing freely through the lock-nut 37 and into the non-circular openings in the ring 30 and sleeve 13. The knob is then secured against lengthwise movement over the shank 10 by means of the pin 31.

It is. obvious from the construction just described that the door lock may be operated in a common manner by either knob and, when the toothed-wheel 20 isin its normal position, the knobs may be operated without sounding an alarm. By depressing the pin 27 and locking it depressed, by moving the pin out of alinement to effect an engagement of the shoulder 29 with the cap-screw 14, the toothed-wheel 20 will be held against the plate 15, where it will contact with the detents 26 so that, when either knob is turned, the toothed-wheel 20 will be turned and through the medium of the detents 26 and dogs 16 the clappers 18 will be brought into contact with the knob proper 12, which will sound an alarm. The pallet 38, retarding or controlling the rotation of the toothedwheel, assures a movement of the clapper into contact with the knob upon each action of each detent. By placing the detents out of diametrical alinement it is obvious that, when they are engaged by the toothed-wheel 20, they will be moved at different times, one movement being slightly in advance of the other so that the clappers will be alternately operated.

I claim: v

1. As a new article of manufacture, an alarm sounding knob for door locks, comprising in combination an escutcheon plate arranged to be secured to a door and provided with a boss, a knob shank arranged to be inserted through said plate and boss, a lock nut arranged to embrace said shank and be held in place in said escutcheon boss, and a knob arranged to be secured to said lock nut. i

2. In a device of the class described, the combination with a knob, a shank and an escutcheon plate having a boss, of a lock nut arranged to embrace the shank and be held in place Within said escutcheon boss, a sleeve,

means for securing said sleeve to said lock nut, means for rotatively securing said sleeve to said shank, and an alarm knob carried by said sleeve, substantially as shown and for the purposes stated.

3. In an alarm sounding. knob for door looks, a rotatable knob shank, a hollow, sectional sounding device, one section thereof being non-rotatably secured about the knobshank, a plate within the said section, a dog I pivotally secured to said plate, a ciapper arranged to engage the other section of said sounding device, an elastic support for the clapper secured to said dog, a toothed whee-l secured to said shank but axially movable name to this specification, in presence of two relatii le theretoaa s lolriilig for nformally holdsubscribing Witnesses. ing t e toothe W ee out 0 engagement With said dog, and. a manually operable WILLIAM KRIZ' means for moving and locking the toothed Witnesses: Wheel in engagement with the dog. E. L. WALLACE,

In testimony whereof, I have signed my N. G. BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

